FDA Approves 'Historic' Cancer Drug

The FDA is approving Perjeta, a drug proven to shrink tumors before surgery in breast cancer patients. CBS News contributor Dr. David Agus joins the "CBS This Morning" co-hosts to discuss the promising drug and what it could mean for cancer patients.

The FDA is approving Perjeta, a drug proven to shrink tumors before surgery in breast cancer patients. CBS News contributor Dr. David Agus joins the "CBS This Morning" co-hosts to discuss the promising drug and what it could mean for cancer patients.

The FDA is approving Perjeta, a drug proven to shrink tumors before surgery in breast cancer patients. CBS News contributor Dr. David Agus joins the "CBS This Morning" co-hosts to discuss the promising drug and what it could mean for cancer patients.